Hermann otto kotter



(No Model.)

H. O. KOTTER, SPROGKET OHAIN AND G'EARING.

Patented May 12, 1891.

UNIT D. STATES PATENT, Grrrcn.

IIERMANN OTTO KUTTER, OF BARMEN, GERMANY.

SPROCKET-CHAIN "AND GEARING.

SPECIFICATION forming part of Letters Patent No. 452,122, dated May 12, 1891.

Application filed January 26, 1891. Serial No. 379,161. (No model.)

To aZZ whom it may concern.-

Be it known that I, HERMANN O'rro KoTTER, manufacturer, of Barmen, in the Kingdom of Prussia and German Empire, have invented new and useful Improvements in Sprocket- Chains and Gearing, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in driving-chains with frame and hooked link.

The improvements in driving-chains and chain-wheels according to this invention are represented in the annexed sheet of drawings, wherein Figure I is a plan view of one of the rootangular links. Fig.1I is a vertical section of the same along the line x w of Fig. I Fig.

' III is a plan view of one form of my connectfied form of link. Fig. VII is a profile View ing-link, and Figs. IV and V are profile views of the same. Fig. VI is a plan viewof a modiof my improved sprocket-wheel and drivechain. Fig. VIII is a vertical section of the same through the line y y of Fig. VII.

These improvements consist, so far as the chain is concerned, of two partsa frame-link A, constructed as shown in Figs. I and II, and a double hook-shaped link B, constructed as shown in Figs. III and IV, which said parts A and B follow one another alternatelyin making up the chain. The frame-shaped links A are of such dimensions that the strain on the material is not too great in proportion to .the force acting thereon, and the inner opening of the same is so proportioned as to fit or connect with the neighboring links.

Hook-shaped links, according to the invention, are, before being placed in the chain, in the form shown at B Fig. V-that is, in the finished chain, the hook-points S S are bent together at the bulge r, so as to lie tightly against the same. The distance of the points S S from the bulge 0" before fixing is great enough to admit of the hanging in of the neighboring link. If the chain-links are made of a material, such as soft forged sheet-steel, the points S S can be bent down after introducing the links A, and also can be opened repeatedly when required to disconnect them without materially injuring the strength. 011 the other hand,- the construction of the chain-links admits of the use of forged or wrought iron or other metal instead of castiron or other metal ordinarily used for such kinds of chains.

The above-mentioned shape of hook of the chain-link forms part of the invention here dealt with, and has for its object the prevention (in case of the chain becoming slack) of the disconnection of the individual links, as has been hitherto the case with the ordinary chain construction.

In connection with this improvement there isthe advantage that it becomes possible to do without the four side wings shown in Fig. III. IVithout these side wings the hook-link has the appearance shown in Fig. VI. The hook-link B has also in the middle a grooveshaped in-bend r, Fig. IV, the object of which is to transfer the motion of the chain to the chain-wheel, which is attained by the bend a laying itself onto a corresponding projection i (see Fig. VIII) on the chain-wheel, producing in this manner a kind of tooth-wheel action. By this mode of action of the chain 011 the wheel further advantages are attained. First, that the chain and wheel work without noise, as the grooves r lay themselves without slipping onto the projection 25, and, secondly, that the locking of the links is prevented by doing away with the action of slipping.

A driving-chain composed of the above-described links is represented in Figs. VII and VIII, also the chain-wheel belonging thereto. 2' designates the teeth customary in the constructions now in use, and they lie into the links A without gripping, and serve only for greater security in the action, preventing, in cases of violent shocks or oscillations, the disengagement of the chain.

What I claim, and desire to secure byv Letters Patent of the United States, is

1. In a driving-chain,the combination of a link A, having a rectangular aperture therein, with a link B, made of pliable metal and having tongues S, bent to iuclose the adjacent ends of the said links A, and a raised portion r in the back of the said link 13, adapted to engage in a projection on the sprocketwheel, substantially as described.

2. The combination, with a driving-chain having alternately links A with rectangular ICO apertures therein, and links 15, made of pliclose the adjacent ends of the said links A, of able metalnvith cavitiesin the back of the said a sprocketwvheel having teeth 12', engaging links 15, of a sprocket-wheel having teeth 12', the said links A, and projections engaging engaging the said links A, and projections I said cavities in the links ll, substantially as 1 5 engaging said cavities in the links ll, snbdescribed.

stantially as described. In witness whereof I have hereunto set my 3. The combination, with a driving-chain hand in presence of two witnesses. having alternately links A with rectangular HERMANN OT 0 KUTTER.

RUDOLPH FRICKE, ALEX. ESSENWEIX.

1o able metal, said links B having cavities in l apertures therein, and links B, made of plil \Vitnesses: their backs and having tongues S bent to ini 

